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<p>Interface to the Lucene search engine, and the 'harvest' API for retrieving items modified within a given date range.</p>

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Warning: Since DSpace 4 the system uses an abstraction layer named Discovery to provide access to different search providers. An <a href="http://lucene.apache.org/solr/">Apache SOLR</a> backend is provided.
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The legacy DSpace search system uses the Jakarta project's Lucene search engine.
<a href="http://lucene.apache.org/">Official Lucene Web Site</a>
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